Started implementing auth

database.py

@@ -1,3 +1,5 @@
+
+import sqlalchemy
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy.ext.declarative import declarative_base
@@ -8,15 +10,16 @@ from fastapi import Depends
 from sqlalchemy.orm import Session
 from typing import Annotated
 
-
-
 URL_DATABASE = "sqlite:///./kanban_clone.db"
 
-engine = create_engine(URL_DATABASE)
+engine = create_engine(URL_DATABASE, echo=True)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 
 Base = declarative_base()
 
+def init_db() -> None:
+    # Import models so they are registered with SQLAlchemy metadata
+    import models  # noqa: F401
     Base.metadata.create_all(bind=engine)
 
 def get_db():

main.py

@@ -1,11 +1,33 @@
-from fastapi import FastAPI, HTTPException, Depends
+from contextlib import asynccontextmanager
 
+from fastapi import FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
 from routers.projects import router as projects_router
+
 from routers.users import router as users_router
+from routers.auth import router as auth_router
+from routers.me import router as me_router
+from database import init_db
 
-app = FastAPI()
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # Place for startup and shutdown events if needed in the future
+    init_db()
+    yield
 
+app = FastAPI(lifespan=lifespan)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:3000", "http://localhost:5173"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(auth_router)
 app.include_router(users_router)
+app.include_router(me_router)
 app.include_router(projects_router)
 
 """ping pong :)"""
@@ -21,3 +43,40 @@ def source():
 ## TODO: Add root endpoint that gives basic info about the API
 ## TODO: Add more detailed error handling and logging
 ## TODO: Implement authentication and authorization mechanisms
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=8000)
+
+
+from fastapi.exceptions import RequestValidationError 
+from fastapi.responses import JSONResponse 
+
+@app.exception_handler(HTTPException) 
+async def http_exception_handler(request, exc): 
+    """Custom HTTP exception handler""" 
+    return JSONResponse( 
+        status_code=exc.status_code, 
+        content={ 
+            "error": { 
+                "message": exc.detail, 
+                "type": "authentication_error" if exc.status_code == 401 else "authorization_error", 
+                "status_code": exc.status_code 
+             } 
+          }, 
+          headers=exc.headers 
+      ) 
+
+@app.exception_handler(RequestValidationError) 
+async def validation_exception_handler(request, exc): 
+    """Handle validation errors""" 
+    return JSONResponse( 
+        status_code=422, 
+        content={ 
+            "error": { 
+                "message": "Validation error", 
+                "type": "validation_error", 
+                "details": exc.errors() 
+           } 
+        } 
+     )

models.py

@@ -1,6 +1,6 @@
 from sqlalchemy import Column, ForeignKey, String, Integer, Table
-from sqlalchemy.orm import relationship
 from sqlalchemy.dialects.sqlite import BLOB
+from sqlalchemy.orm import relationship
 from database import Base
 from typing import Optional, List
 
@@ -14,16 +14,17 @@ project_user = Table(
 class User(Base):
     __tablename__ = "users"
 
-    id = Column(Integer, primary_key=True, index=True)
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
     name = Column(String, index=True)
     email = Column(String, unique=True, index=True)
-    password_hash = Column(BLOB)
+    password_hash = Column(String)
+    password_salt = Column(String)
     projects = relationship("Project", secondary=project_user, back_populates="users")
 
 class Project(Base):
     __tablename__ = "projects"
 
-    id = Column(Integer, primary_key=True, index=True)
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
     name = Column(String, index=True)
     description = Column(String)
     users = relationship("User", secondary=project_user, back_populates="projects")
@@ -32,7 +33,7 @@ class Project(Base):
 class Task(Base):
     __tablename__ = "tasks"
 
-    id = Column(Integer, primary_key=True, index=True)
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
     title = Column(String, index=True)
     description = Column(String)
     status = Column(String, default="pending")

routers/auth.py

@@ -0,0 +1,126 @@
+import os
+
+from fastapi import APIRouter, Depends, HTTPException, status, Response
+from database import db_dependency
+from jose import JWTError, jwt
+from datetime import datetime, timedelta, timezone
+import models
+
+import schemas.users as user_schemas
+import routers.users as user_router
+
+from pyargon2 import hash
+
+router = APIRouter(prefix="/auth", tags=["auth"])
+
+SECRET_KEY = os.getenv("SECRET_KEY", "your-secret-key-change-this-in-production")
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 1440  # 24 hours
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    to_encode.update({"exp": expire})
+    to_encode.update({"iat": datetime.now(timezone.utc)})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+@router.post("/login")
+def login(user_data: user_schemas.UserLogin, response: Response, db: db_dependency):
+    """Login and receive JWT token in cookie"""
+    db_user = db.query(models.User).filter(models.User.email == user_data.email).first()
+    if db_user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password"
+        )
+    
+    if not verify_user_password(getattr(db_user, "id"), user_data.password, db):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password"
+        )
+    
+    access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={"sub": str(db_user.id)}, expires_delta=access_token_expires
+    
+    )
+    
+    # Set JWT in httpOnly cookie
+    response.set_cookie(
+        key="access_token",
+        value=access_token,
+        httponly=True,
+        max_age=ACCESS_TOKEN_EXPIRE_MINUTES * 60,
+        samesite="lax",
+        secure=False  # Set to True in production with HTTPS
+    )
+    
+    return {
+        "message": "Login successful",
+        "user": {
+            "id": db_user.id,
+            "name": db_user.name,
+            "email": db_user.email
+        }
+    }
+
+@router.post("/logout")
+def logout(response: Response):
+    """Logout by clearing the JWT cookie"""
+    response.delete_cookie(key="access_token")
+    return {"message": "Logout successful"}
+
+def verify_jwt_token(token: str):
+    """Verify and decode a JWT token"""
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+    )
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        user_id = payload.get("sub")
+        if user_id is None:
+            raise credentials_exception
+        return user_id
+    except JWTError:
+        raise credentials_exception
+
+def get_current_user(request, db: db_dependency):
+    """Get current authenticated user from cookie"""
+    token = request.cookies.get("access_token")
+    
+    if not token:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Not authenticated"
+        )
+    
+    user_id = verify_jwt_token(token)
+    user = db.query(models.User).filter(models.User.id == int(user_id)).first()
+    
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found"
+        )
+    
+    return user
+
+
+def verify_user_password(user_id: int, password: str, db: db_dependency) -> bool:
+    """Verify user's password"""
+    db_user = db.query(models.User).filter(models.User.id == user_id).first()
+    if db_user is None:
+        return False
+    
+    hashed_password = hash(password=password, salt=str(getattr(db_user,"password_salt")), variant="id")
+    if hashed_password != db_user.password_hash:
+        return False
+
+    return True

routers/me.py

@@ -0,0 +1,45 @@
+from fastapi import APIRouter, Depends, HTTPException, status, Response, Request
+from database import db_dependency
+from jose import JWTError, jwt
+from datetime import datetime, timedelta, timezone
+import models
+import os
+
+from routers import auth
+import schemas.users as user_schemas
+import routers.users as user_router
+
+router = APIRouter(prefix="/me", tags=["me"])
+
+@router.get("/", response_model=user_schemas.UserBase)
+def get_me(request: Request, db: db_dependency):
+    """Get current authenticated user"""
+    token = request.cookies.get("access_token")
+
+    if not token:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Not logged in"
+        )
+    
+    try:
+        payload = jwt.decode(token, auth.SECRET_KEY, algorithms=[auth.ALGORITHM])
+        user_id: str = str(payload.get("sub"))
+        if user_id is None:
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Not logged in"
+            )
+    except JWTError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Could not validate credentials"
+        )
+    
+    db_user = db.query(models.User).filter(models.User.id == int(user_id)).first()
+    if db_user is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found"
+        )
+    return db_user

routers/users.py

@@ -1,3 +1,4 @@
+import os
 from typing import List
 from fastapi import APIRouter, HTTPException, Depends
 from database import db_dependency
@@ -7,10 +8,11 @@ import models
 import schemas.users as users
 import schemas.projects as projects
 
+from pyargon2 import hash
+import pyargon2
+
 router = APIRouter(prefix="/users", tags=["users"])
 
-
-
 """Get a user by ID"""
 
 @router.get("/{user_id}", response_model=users.UserBase)
@@ -28,8 +30,8 @@ def update_user(user_id: int, user: users.UserBase, db: db_dependency):
     db_user = db.query(models.User).filter(models.User.id == user_id).first()
     if db_user is None:
         raise HTTPException(status_code=404, detail="User not found")
-    db_user.name = user.name
-    db_user.email = user.email
+    setattr(db_user, "name", user.name)
+    setattr(db_user, "email", user.email)
     db.commit()
     db.refresh(db_user)
     return db_user
@@ -52,12 +54,31 @@ def read_projects_from_user(user_id: int, db: db_dependency):
 """Create a new user"""
 
 @router.post("/", response_model=users.UserBase)
-def create_user(user: users.UserBase, db: db_dependency):
+def create_user(user: users.UserCreate, db: db_dependency):
+    
+    user_salt = os.urandom(32).hex()
+    print("Generated salt:", user_salt)
+    
+    hashed_password = hash(password=user.password, salt=user_salt, variant="id")
+    
     db_user = models.User(
         name=user.name,
-        email=user.email
+        email=user.email,
+        password_hash=hashed_password,
+        password_salt=user_salt
     )
+
     db.add(db_user)
     db.commit()
     db.refresh(db_user)
     return db_user
+
+@router.delete("/{user_id}")
+def delete_user(user_id: int, db: db_dependency):
+    db_user = db.query(models.User).filter(models.User.id == user_id).first()
+    if db_user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    db.delete(db_user)
+    db.commit()
+    return {"detail": "User deleted"}
+

schemas/users.py

@@ -8,7 +8,9 @@ class UserBase(BaseModel):
     name: str
     email: str
 
-class UserCreate(UserBase):
+class UserCreate(BaseModel):
+    name: str
+    email: str
     password: str
 
 class UserUpdateInfo(BaseModel):
@@ -19,3 +21,6 @@ class UserUpdatePassword(BaseModel):
     password: str
     new_password: str
 
+class UserLogin(BaseModel):
+    email: str
+    password: str